Corporation stop



Sp., 194m L. w. MUELLER ET AL CORPORATION STOF Filed April 13, 1945F`IE. i

@my f Zd Patented Sept. 6, 1949 CORPORATION STOP Lucien W. Mueller,Walter J. Bowan, and Wallace E. Gould, Decatur, Ill., assignors toMueller Co., Decatur, Ill., a corporation of Illinois Application April13, 1945, Serial N0. 588,096

1 Claim.

This invention relates to corporation stops and method of installing thesame and has as its principal object to provide an installationobviating the usual threaded connection between the stop and the mainwhile yet establishing an effective interlock between the two. Theinvention has special value in cases where the main is of Transite orother similar plastic material which quickly dulls the tap used inthreading the main opening, although the invention is not limited tothis particular use. An installation in accordance with the invention isshown by way oi example in the accompanying drawing, in which Figure 1shows a portion of a main in transverse section and a stop, partially inlongitudinal section and partially in elevation, in process ofinstallation;

Figure 2 is an elevation of the lower portion of the stop of Figure 1,and

Figure 3 is a view like Figure 1 showing the completed installation.

The stop comprises an elongated body 5 having a longitudinal ow passage6 intersected by a conical valve seat which receives a conical valveplug l. One end of the body is provided with threads 8 through which thestop can be coupled with the service line.

The other end of the body is constituted by a neck 9 provided with acontinuous external thread l from adjacent the valve to the outerextremity of the neck. Threaded on the neck is an abutment nut II, hereshown as being of the form disclosed in the patent to J. W. Simpson No.2,265,703 of December 9, 1941. Outwardly of nut il a sleeve I2 freelyembraces the neck so that the latter is relatively rotatable, the sleevebeing of rubber or equivalent material, either natural or synthetic.Adjacent nut I I the sleeve has an integral annular flange I3 andinterposed between the flange and the nut is an anti-,friction washerI4. Threaded on the extremity of neck 9 ls a circular nut I which isdownwardly tapered and has upwardly projecting lugs I6 and I'I engagedin recesses in the lower end of sleeve I2 in the manner particularlyshown in Figure 2. These interengaging provisions are typical of meansby which the sleeve and nut I5 may be held against relative rotation.Desirably the two are bonded together. With the nut I I at the inner endof the neck portion 9 and the nut I5 at the outer extremity of thelatter, as illustrated in Figure 1, the sleeve I2 presents a smoothcylindrical exterior between flange I3 and nut I5 and its length issubstantially greater than the thickness of the main with which the stopis to be associated.

In installing the stop, the main I8, which is assumed to contain a uidunder pressure, has a drilling machine mounted thereon and a lateralopening I9 of somewhat greater diameter than the sleeve I2 is formed inthe main. The drilling machine may be of the type as shown, for example,in the patent to F. H. Mueller et al., No. 2,296,651 of September 22,1942. After the opening has been formed, the boring bar is withdrawn andthe bit is replaced by a stop inserting tool such as is shown, forexample, in the patent to F. H. Mueller et al., No. 2,247,427 of July 1,1941, and the threads 8 of the closed stop are engaged with the tool.

The boring bar is then lowered to insert the neck portion and sleevethrough the main opening, the stop end being guided into the latter bythe tapered outer wall of nut I5. After flange I3 has come into contactwith the top margin of the opening I9, downward pressure is exerted onthe boring bar so that the abutment nut II, through washer I4,compresses ange I3 against the main, whereupon the boring bar is turned,while the downward pressure is maintained, so that nut I5 is threadedupwardly by reason of the fact that it is held by the sleeve againstrotation. The rising of nut I5 bulges the sleeve into engagement withthe wall of the opening and with the neck threads and also develops anannular bulge 20, Figure 3, under the lower edge of the opening I9 sothat the stop is locked to the main. During this operation the washer I4takes the thrust of nut I I so that the latter can be readily rotatedwith the stop body relatively to the sleeve. After the interlock hasbeen efiected, the inserting tool is unthreaded from the stop and thedrilling machine dismounted. If necessary, nut II can then be threadeddownwardly to further compress gasket I3 to perfect the seal between itand the main, and to further expand the bulge 20 for Y,fullelectiveness. In this manner, a full peripheral seal is provided withthe top and bottom margins of the opening and also throughout the lengthof the latter.

It will be understood that the described form and arrangement of partsare susceptible of variation without departure from the invention asdefined in the claim which follows:

We claim:

A coupling for connection to an element comprising an elongated bodyhaving a longitudinal flow passage, one end of said body being in theform of an externally threaded, tubular neck portion, an annularabutment threaded on said neck portion back from the outer end thereof,a rubber sleeve freely embracing said neck portion outwardly of saidabutment and having an annular iiange adjacent said abutment, and a nutthreaded on said neck portion, the top of said nut being fixed to theouter edge of said rubber sleeve, whereby the rotation of said neck insaid nut draws the nut toward the abutment for distorting the rubbersleeve in overlapping engagement with said element. y

LUCIE'N W. MUELLER. WALTER J. BOWAN. WALLACE EL GOULD.

'4 REFERENCES CITED The following references are of record in the fileof this patent:

UNITED STATES PATENTS Number Name Date 590,590 Prevet Sept. 28, 1897945,517 Goodwin Jan. 4, 1910 966,748 Honecker Aug. 9, 1910 1,599,098 MixSept. 7, 1926 FOREIGN PATENTS Number Country Date 512,256 Great BritainAug. 31, 1939 735 Great Britain Jan. 11, 1910

